They couldn't just use friction-hold wheel covers on my BUICK.
Instead, some yo-yo at GM designed "special, double-threaded wheel nuts"
You attach the wheel covers to these with plastic nuts.
This works well, if you never change the wheel !
Unfortunately, whenever I have the tires rotated,
some numb-nuts kid takes the air-wrench to the plastic nuts,
and strips them all !
I don't know how many replacements I've bought at the GM dealer......
GM's been doin' wheels a long long time.
They couldn't leave well-enough alone.